JP2003299979A - Electrode for crusher and crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode for a crusher having a sufficient durability, and a crusher. <P>SOLUTION: The electrode 4 for the crusher consists of a stranded wire where a plurality of linear electric conductors 12, 13 arranged so as to face each other through a dielectric material are twisted. A material composing at least one linear electric conductor 13 among a plurality of the linear electric conductors 12, 13 has a strength higher than a material composing the other electric conductors 12. Thereby the durability of the electrode 4 for the crusher against impact can be improved. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing device electrode and a crushing device, and more particularly to a crushing device electrode and a crushing device having sufficient durability.

[0002]

2. Description of the Related Art As a crushing device for crushing rock or the like, the inventor has proposed a crushing device having a structure as shown in FIG. 12, for example. FIG. 12 is a schematic diagram for explaining a crushing device related to the present invention. FIG. 13 is a schematic diagram showing the tip of the electrode of the crushing device shown in FIG. 12
And the crushing apparatus relevant to the present invention will be described with reference to FIG.

As shown in FIGS. 12 and 13, the crushing apparatus related to the present invention has an electrode 10 which is an electrode for the crushing apparatus.
1, a pulse power source 106, and a power source 109. The pulse power source 106 includes a capacitor 108 and a switch 10.
It is composed of a circuit including 7 and the like. A power source 109 is connected to the pulse power source 106. The circuit of the pulse power source 106 is grounded. The one cable 103, the other cable 104, and the cable portions 105a to 105c that configure the electrode 101 connected to the pulse power source 106 are configured by using a single-core insulated wire in which a conductor such as copper is covered with an insulator. As the insulator, for example, a dielectric such as an insulating resin is used. Copper is used as the conductor.

The electrode 101 includes one cable 103 extending in a certain direction, another cable 104 and cable portions 105a to 105c extending in the same direction as the one cable 103 extends, the one cable 103 and the other cable 104. And cable portions 105a to 105
Fixing members 112a to 112h for fixing c and c are provided. As a material forming the fixing members 112a to 112h, for example, a reinforced fiber tape using fibers such as glass can be used.

As can be seen from FIGS. 12 and 13,
On the other hand, at the end of the cable 103, the cable portion 10 extends in the same direction as the direction in which the one cable 103 extends.
5a is arranged. On the other hand, a gap 117a is formed between the end of the cable 103 and the end of the cable portion 105a.
Is formed. Also, the cable portions 105a to 105c
Are arranged to face each other via gaps 117b and 117c, respectively. The cable portion 105c is arranged so as to face the other cable 104 via the gap 117d.

As shown in FIG. 1, the electrode 101 is inserted into a prepared hole 110 formed in an object 102 to be crushed such as rock. Inside the lower hole 110, water 11 as an electrolytic solution
1 is arranged.

When the charge stored in the capacitor 108 is introduced into the electrode 1 when the switch 7 of the pulse power source 106 is closed, it is positioned between the end of the cable 103 and the cable portion 105a. Gap 1
A first discharge occurs at 17a, causing an arc 118a.
(See FIG. 13) is formed. Also, the cable portion 10
A second discharge is generated in the gap 117b located between the cable portion 105a and the cable portion 105b, and the arc 118b.
Is formed. Similarly, a gap 117c located between the cable portions 105b and 105c is also provided.
Also in, a discharge is generated and an arc 118c is formed. Further, the cable portion 105c and the other cable 10
A discharge is generated in the gap 117d located between the arc 117 and the arc No. 4 and an arc 118d is formed. In the region where the arcs 118a to 118d are formed as described above, the pressure wave is generated by the water 111 as the electrolytic solution being turned into plasma by the discharge energy. By this pressure wave, the crushing target object 102 around the electrode 101 can be destroyed.

The inventor has also proposed a structure as shown in FIG. 14 as the structure of the electrode 101 of the crushing device shown in FIGS. 12 and 13. FIG. 14 is a schematic perspective view showing a modification of the crushing device electrode according to the present invention.

The electrode 101 as the crushing device electrode shown in FIG. 14 is mounted on the crushing device shown in FIGS. 12 and 13, but is different from the electrode 101 shown in FIGS. 12 and 13. It has a structure. That is, FIG.
The electrode 101 of the crushing device shown in FIG.
3 and the other cable 104 and cable portion 105a
To 105d are twisted with each other. Then, the one cable 103 and the other cable 104
The arrangement of the cable portions 105a to 105d is fixed to each other by the fixing members 112a to 112m.

When a current is supplied to the electrode 101 shown in FIG. 14, one end of the cable 103 and the cable portion 10 are connected.
A discharge is generated in the gap 117a between the end of 5a and an arc, and an arc is formed. Also, the cable portion 105
In the gaps 117b to 117e formed between the cables a to 105d and the other cable 104 as well, an arc is formed by the occurrence of discharge. As a result, FIG.
And the crushing target 1 as in the crushing device shown in FIG.
02 (see FIG. 12) can be destroyed.

[0011]

However, the above-mentioned FIG.
The crushing device shown in FIGS. 2 to 14 has the following problems. That is, when crushing rock or the like in the crushing device shown in FIGS. 12 to 14, the electrode 101 is strongly impacted by the pressure wave generated due to the discharge. Due to this impact, the cable 103 forming the electrode 101 is formed.
On the other hand, the cable 104 or the like may be torn off. This is because the tensile strength of the conductor such as copper forming one cable of the electrode 101 is insufficient, or the strength of the fixing members 112a to 112m is insufficient. It is considered that 101 is unbearable. Thus the electrode 1
When 01 is damaged, the crushing work cannot be performed continuously, so the efficiency of the crushing work is reduced. It is also necessary to replace the damaged electrode 101 with a new electrode. Therefore, the running cost of the crushing work has been increased.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electrode for a crushing device and a crushing device having sufficient durability.

[0013]

An electrode for a crushing device according to one aspect of the present invention comprises a twisted wire formed by twisting a plurality of linear conductors arranged so as to face each other with a dielectric interposed therebetween. In the crushing device electrode, the material forming at least one linear conductor of the plurality of linear conductors is other than the one linear conductor of the plurality of linear conductors. It is a material having a higher strength than the material forming the linear conductor of.

In this case, since a high-strength material is used as the material of the linear conductor that constitutes the crushing device electrode (hereinafter, also referred to as an electrode), the durability of the electrode against impact can be improved. .

Further, when a current is supplied to the crushing device electrode, a discharge can be generated between the end faces of the plurality of linear conductors at the tip of the electrode. By this discharge,
The electrolytic solution or the like arranged around the electrodes can be turned into plasma. The pressure wave generated along with the plasma of the electrolytic solution can crush the object to be crushed around the electrode.

Further, some of the linear conductors forming the electrodes are made of a high-strength material, while the other linear conductors are made of a material having a relatively low strength. If a material having a sufficiently low value is used, the electric resistance of the entire electrode can be reduced. Therefore, it is possible to realize an electrode which has sufficient durability against shock due to a pressure wave and can supply a large current.

In the crushing device electrode according to the above aspect 1, the linear conductor made of a high-strength material has a cross section of the stranded wire substantially perpendicular to the extending direction of the stranded wire. It may be located substantially in the center. Also,
Other linear conductors arranged around the linear conductor made of the high-strength material may be made of a material having lower electric resistance than the high-strength material.

In this case, since the linear conductor made of a high-strength material is arranged in the central portion of the crushing device electrode, the strength of the crushing device electrode can be surely improved.

Further, since another linear conductor made of a material having a relatively low electric resistance is arranged on the outer peripheral side of the crushing device electrode, when a high frequency current is supplied to the crushing device electrode, The electric resistance can be effectively reduced.

In the crushing apparatus electrode according to the above aspect 1, at least one of the plurality of linear conductors is arranged with a gap between the first conductor and the first conductor. And a second conductor.

In this case, when current is supplied to the crushing device electrode, discharge can be generated even in the gap between the first conductor and the second conductor. That is, it is possible to increase the number of places where discharge occurs. For this reason,
The discharge resistance of the electrodes can be increased. Here, the energy consumed by the discharge at the electrode (the energy used for crushing) is the square of the current value supplied to the electrode ×
Proportional to discharge resistance. That is, by increasing the discharge resistance at the electrodes, the energy used for crushing can be increased.

In the crushing apparatus electrode according to the above aspect 1, a layer containing a noble metal is provided on the surface of at least one of the first conductor and the second conductor facing the gap. May be formed.

In this case, the crushing force at the time of discharge of the first or second conductor facing the gap can be increased.

An electrode for a crushing device according to another aspect of the present invention is a twist obtained by arranging a plurality of strands including a plurality of element wires made of a conductor so as to face each other with a dielectric interposed therebetween and then twisting the strands. In the crushing device electrode made of a wire, the material forming at least one strand of the plurality of strands is a wire other than the one strand of the plurality of strands. It is a material with higher strength than the constituent materials.

With this structure, since a high-strength material is used as a material of a part of the wire constituting the crushing device electrode (electrode), the durability of the electrode against impact can be improved.

Further, when a current is supplied to the electrodes, a discharge can be generated between the end faces of the plurality of strands at the tips of the electrodes. By this discharge, the electrolytic solution or the like arranged around the electrodes can be turned into plasma. The pressure wave generated along with the plasma of the electrolytic solution can crush the object to be crushed around the electrode. The crushing device electrode according to the present invention has sufficient durability against the impact due to the pressure wave as described above, by using the wire made of a high-strength material.

In addition, a part of the wires forming the electrodes is made of a high-strength material, while the other wires are made of a material having a relatively low strength but a sufficiently low electric resistance. If is applied, the electric resistance of the entire electrode can be reduced. In this way, it is possible to realize an electrode that has sufficient durability against shock due to pressure waves and can supply a large current.

In the crushing device electrode according to another aspect, the plurality of strands may include a plurality of high-strength strands composed of the high-strength material, and the high-strength strands are strands. It may be distributed in the inside of.

Here, when the high-strength wires and the other wires have different electrical resistances due to the difference in the materials of the high-strength wires and the other wires (for example, the high-strength wires have different electric resistances). Higher than the electrical resistance of the wire). In this case, when a predetermined current is passed through the high-strength wire having a relatively high electric resistance, the high-strength wire may become high temperature due to Joule heat. However, if the high-strength wires are dispersedly arranged in the strand as described above, the heat of the high-strength wires can be sufficiently removed by other surrounding wires. Therefore, it is possible to suppress the temperature of the strand from becoming high due to Joule heat from the high-strength wire.

In the crushing device electrode according to the above-mentioned another aspect, the strands in which the high-strength element wires are dispersedly arranged may be a part of the strands forming the crushing device electrode, or all the strands. May be

In the crushing apparatus electrode according to the above-mentioned another aspect, in the cross section of the twisted wire in a direction substantially perpendicular to the extending direction of the twisted wire, the strands forming the strand located substantially at the center are: It may be made of a high-strength material. Further, the strands of the other strands arranged around the strands of the strands of the high-strength material may be made of a material having lower electric resistance than the high-strength material. .

In this case, since the strands (high-strength strands) composed of the wire made of high-strength material are arranged in the central portion of the crushing device electrode, the strength of the crushing device electrode can be reliably improved. it can.

Further, since a strand (low resistance strand) made of another strand made of a material having a relatively low electric resistance is arranged on the outer peripheral side of the crushing device electrode, when a high frequency current is supplied to the crushing device electrode. The electric resistance of the crushing device electrode can be effectively reduced.

In the crushing device electrode according to the above-mentioned another aspect, the strands located substantially in the center in the cross section substantially perpendicular to the extending direction of the strands may be made of a high-strength material. In addition, among a plurality of strands forming the electrode for the crushing device, the strand made of a high-strength material may be arranged in the central portion in this way only in a part of the strands, or in the central portion in all the strands. A wire made of a high-strength material may be arranged at the position.

In this case, the strength of the strand including the strand made of a high-strength material can be surely improved.

In the crushing device electrode according to the another aspect described above, at least one of the plurality of strands is arranged with a gap between the first portion and the first portion in the extending direction of the strand. And a second portion formed by cutting.

In this case, when the electric current is supplied to the crushing device electrode, the discharge can be generated even in the gap between the first portion and the second portion. That is, it is possible to increase the number of places where discharge occurs. Therefore, the discharge resistance of the electrode can be increased. Therefore, the energy used for crushing can be increased.

In the crushing device electrode according to the another aspect, a layer containing a noble metal is formed on at least one surface of the first portion and the second portion facing the gap. It may have been done.

In this case, it is possible to reduce the wear of the first or second portion facing the gap during discharge.

In the crushing device electrode according to another aspect, a layer containing a noble metal is formed on the surface of at least one end of a plurality of strands located at the tip of the crushing device electrode. It may have been done.

In this case, the crushing force can be increased when electric discharge occurs between the ends of the strand on the tip side of the crushing device electrode.

In the crushing device electrode according to the first aspect or another aspect, the layer containing the noble metal is gold (A
u), silver (Ag), platinum (Pt), iridium (I
It is preferable to include at least one selected from the group consisting of r), rhodium (Rh), ruthenium (Ru), palladium (Pd), and alloys thereof. Further, it is more preferable to use a layer containing silver as the layer containing the noble metal.

A crushing apparatus according to another aspect of the present invention is
An electrode for a crushing device according to the above aspect 1 or another aspect is provided.

By doing so, it is possible to easily obtain a crushing device having excellent durability.

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding parts will be denoted by the same reference numerals and the description thereof will not be repeated.

(Embodiment 1) FIG. 1 is a schematic diagram for explaining Embodiment 1 of an electrode and a crushing apparatus using the electrode according to the present invention. FIG. 2 is a schematic perspective view showing a tip portion of the electrode shown in FIG. FIG. 3 is a schematic sectional view taken along line III-III in FIG. FIG. 4 is a schematic cross-sectional view in the longitudinal direction of the center electrode wire forming the electrode shown in FIG. Embodiment 1 of an electrode and a crushing device according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, the crushing device according to the present invention comprises an electrode 1 which is a crushing device electrode, a pulse power source 6 and a power source 9. The pulse power source 6 is a capacitor 8,
It is composed of a circuit including the switch 7 and the like. Pulse power source 6
A power source 9 is connected to. Although not shown, the circuit of the pulse power source 6 is grounded. Pulse power source 6
The electrode 1 and the electrode 1 are connected by a cable 5. Electrode 1
Is composed of a connector portion 3 which is a connection portion with the cable 5 and a wire electrode portion 4 which is connected to the connector portion 3.

As shown in FIG. 2, the wire electrode portion 4 has a structure similar to a so-called wire rope in which six outer peripheral electrode wires 12 are twisted around a central electrode wire 13 extending in a certain direction. . As shown in FIGS. 3 and 4, the center electrode wire 13 covers the conductor 15 as a steel linear conductor extending in a certain direction and the periphery of the conductor 15 (on the outer peripheral surface). 2) and the insulating coating film 14 as a dielectric. The six outer peripheral electrode wires 12 twisted around the center electrode wire 13 are conductors 16 as linear conductors containing copper, respectively, and a dielectric material covering the periphery of the conductor 16. The insulating coating film 14 of FIG. Although copper may be used as the conductor 16, copper alloy, aluminum, aluminum alloy, silver, silver alloy, or the like may be used. As the insulating coating film 14, a dielectric material such as plastic, rubber, vinyl, and insulating resin can be used.

At the tip of the wire electrode portion 4, the conductors 15 and 16 are exposed at the end faces of the center electrode wire 13 and the outer peripheral electrode wire 12, respectively. Further, in each of the outer peripheral electrode wires 12, a gap 1 as a gap is formed by partially removing the middle part thereof.
7 are formed. In the wire electrode portion 4 shown in FIGS. 1 to 3, each outer peripheral electrode wire 12 has one gap 17 formed therein. That is, each conductor 16 (see FIG. 2) of the outer peripheral electrode wire 12 has a tip-side conductor portion 24 (see FIG. 2) as a first conductor located on the tip side of the wire electrode portion 4, and a second conductor. End side conductor portion 2 as a conductor of
5 (see FIG. 2). Also in this gap 17, the conductor 16 is exposed at the end face of the outer peripheral electrode wire 12.

As shown in FIG. 3, in the cross section of the wire electrode portion 4 in a direction substantially perpendicular to the direction in which the electrode 1 extends, the center electrode wire 13 located substantially in the center is
Although it may be substantially linear as shown in FIG. 4, it may have a bent portion.

Next, the operation of the crushing apparatus using the electrode 1 shown in FIGS. 1 to 4 will be briefly described. As shown in Figure 1,
The electrode 1 is a prepared hole 10 formed in a crushing object 2 such as rock.
Inserted inside. Water 11 as an electrolytic solution is arranged inside the lower hole 10.

Electric charges are accumulated in advance in the capacitor 8 of the pulse power source 6 from the power source 9. Then, when the switch 7 of the pulse power source 6 is closed in the state as shown in FIG. 1, the electric charge stored in the capacitor 8 is introduced into the electrode 1. Then, at the tip of the wire electrode portion 4,
The conductor 1 exposed on the end face of the center electrode wire 13 (see FIG. 2)
5, a discharge is generated in the gap 23 formed between the outer peripheral electrode wire 12 (see FIG. 2) and the conductor 16 (see FIG. 2) exposed on the end face. As a result, an arc is formed in the gap 23. Further, discharge also occurs in the gap 17 formed in the middle of the outer peripheral electrode wire 12. As a result, an arc is formed in each of the gaps 17.

As described above, since a plurality of discharges can be simultaneously generated at the tip of the electrode 1, the crushing target 2 (see FIG. 1) can be crushed efficiently.
That is, the plurality of gaps 2 formed in the wire electrode portion 4
Since a discharge can be generated at 3, 17,
The number of places where discharge occurs can be increased. As a result, the discharge resistance of the electrode 1 can be increased,
The energy used for crushing can be made larger than before.

Further, the conductor 15 of the center electrode wire 13 (see FIG.
Since steel is used as the reference electrode), the wire electrode portion 4 can be made stronger than the conventional electrode in which all the conductors are made of copper or the like. That is, the durability of the wire electrode portion 4 against impact can be improved. Further, as shown in FIG. 3, since the center electrode wire 13 including the steel conductor 15 is arranged at the center of the wire electrode portion 4, it is possible to reliably improve the durability of the wire electrode portion 4. it can.

Further, since the conductor 15 is formed only of the center electrode wire 13 from steel as a high-strength material, and the conductor 16 of the peripheral electrode wire 12 is formed from copper having a relatively low electric resistance. The overall electric resistance of the wire electrode portion 4 is sufficiently smaller than that in the case where all the conductors 15 and 16 of the center electrode wire 13 and the outer peripheral electrode wire 12 are made of steel. As a result, the electrode 1 having a high strength and a sufficiently low electric resistance value can be realized. That is, it is possible to realize the electrode 1 which has sufficient durability against the impact due to the pressure wave and can supply a large current.

Since the outer peripheral electrode wire 12 as another linear conductor made of copper, which is a material having a relatively low electric resistance, is arranged on the outer peripheral side of the wire electrode portion 4 as described above, the electrode 1 (see FIG. 1), for example, when supplying a high frequency current,
The electric resistance in the electrode 1 can be effectively reduced.

The high-strength material forming the conductor 15 specifically refers to a material having a higher tensile strength than the conductor such as copper forming the conductor 16. In addition, the conductor 15
As a material for forming the conductive material, a material other than steel may be used as long as the conductive material has a higher tensile strength than a conductive material such as copper forming the conductive material 16.

FIG. 5 shows the first embodiment of the electrode according to the present invention.
It is a cross-sectional schematic diagram which shows the modification. FIG. 5 corresponds to FIG. Embodiment 1 of the electrode according to the present invention with reference to FIG.
A modified example will be described.

As shown in FIG. 5, in the wire electrode portion 4 of the modified example of the electrode 1 (see FIG. 1), steel conductors 15 are used for three of the outer peripheral electrode wires 12. Then, the conductors 16 made of copper are used for the other three of the center electrode wire 13 and the outer peripheral electrode wire 12. As described above, by using the steel conductor 15 for a part of the center electrode wire 13 or the outer circumference electrode wire 12 that constitutes the electrode 1, sufficient strength is obtained as in the electrode shown in FIGS. 1 to 4. It is possible to realize an electrode having a relatively low resistance.

The center electrode line 13 and the outer peripheral electrode line 1
Which of the two uses the steel conductor 15 is not limited to the configuration shown in FIG. 5, and other configurations may be adopted.

In the wire electrode portion 4 of the electrode 1 (see FIG. 1) according to the first embodiment of the present invention, a gap 17 is formed in the middle of the outer peripheral electrode wire 12 as shown in FIG. Instead of forming the gap 17 in the electrode wire 12, the discharge may be generated only in the gap 23 (see FIG. 2) at the tip of the wire electrode portion 4.

Further, one or more gaps 17 may be formed in each of the outer peripheral electrode wires 12, or only a part of the outer peripheral electrode wires 12 may be formed.

(Embodiment 2) FIG. 6 is a partial perspective schematic view showing Embodiment 2 of an electrode according to the present invention. FIG. 6 corresponds to FIG. Embodiment 2 of the electrode according to the present invention will be described with reference to FIG.

As shown in FIG. 6, the wire electrode portion 4 constituting the second embodiment of the electrode according to the present invention is basically the wire electrode portion 4 in the first embodiment of the electrode according to the present invention.
(See FIG. 2) but with a gap 17,
The structures of the end portions of the central electrode wire 13 and the outer peripheral electrode wire 12, which are areas facing 23, are different. That is, in the tip portion of the wire electrode portion 4, the end portion of the center electrode wire 13 is provided in FIG.
As shown in, a cap member 18 made of silver is connected to the electric conductor 15 made of steel.

FIG. 7 is a schematic cross-sectional view in the longitudinal direction of the center electrode wire forming the wire electrode portion 4 shown in FIG. As can be seen from FIG. 7, the center electrode wire 13 includes a conductor 15 made of steel, a cap member 18 as a layer containing a noble metal connected to the tip of the conductor 15, the conductor 15 and the cap member. The insulating coating film 14 covers the side surfaces of the insulating film 18.

As for the outer peripheral electrode wire 12 which constitutes the wire electrode portion 4, as shown in FIG.
Similarly to the above, a cap member 18 made of silver is arranged at the tip end portion so as to cover the end face. Wire electrode part 4
The cross-sectional structure of the outer peripheral electrode wire 12 at the tip end thereof in the longitudinal direction is substantially the same as the cross-sectional structure of the center electrode wire 13 shown in FIG. 7. That is, in the outer peripheral electrode wire 12, the cap member 18 as a layer containing a noble metal connected to the conductor 16 (not shown) made of copper at the tip thereof is arranged. The cap member 18 may be formed by brazing silver. Alternatively, a cap member 18 made of silver is pressure-bonded to the end surfaces of the conductors 15 and 16,
Alternatively, the center electrode wire 13
The outer peripheral electrode wire 12 may be formed.

Further, in the gap 17 formed in the wire electrode portion 4, a brazing portion 19 in which silver is brazed is formed on the end face of the outer peripheral electrode wire 12. That is, as shown in FIG. 8, a brazing portion 19 as a layer containing a noble metal is formed on the end surface of the outer peripheral electrode wire 12 facing each other in the gap 17, and the brazing portion 19 and the conductor 16 made of copper are electrically connected to each other. Are connected to each other. Here, FIG. 8 is a schematic cross-sectional view in the direction along the extending direction of the outer peripheral electrode wire in the vicinity of the gap formed in the middle of the outer peripheral electrode wire in the wire electrode portion shown in FIG.

In this way, the gap 1 where the discharge is generated
By forming the cap member 18 made of silver or the brazing portion 19 brazed with silver so as to cover the conductors 15 and 16 facing the conductors 7 and 23, the outer peripheral electrode wire 12 and the center electrode wire 13 due to discharge are formed. Can be suppressed.

As a method of disposing silver in the regions facing the gaps 17 and 23, a method other than the method of disposing the cap member 18 or the brazing portion 19 as described above may be used. Good. For example, a method of depositing silver on the end faces of the conductors 15 and 16 may be used.

In addition to silver, gold, platinum, iridium, rhodium, ruthenium, palladium, and alloys thereof may be used as the material forming the cap member 18 and the brazing portion 19.

If the cap member 18 arranged at the tip of the electrode 1 is arranged on at least one of the end face of the center electrode wire 13 facing the gap 23 and the end face of the outer peripheral electrode wire 12. Good. Similarly, the brazing part 19 may be formed on at least one of the two end faces of the outer peripheral electrode wire 12 facing the gap 17.

Further, in the first and second embodiments of the present invention, the number of the outer peripheral electrode wires 12 constituting the wire electrode portion 4 is not limited to six as shown in the figure, but may be any number as long as it is one or more. Can be In addition, the center electrode line 13
(See FIG. 2) may be omitted, and the wire electrode portion 4 may be configured by twisting only a plurality of outer peripheral electrode wires 12.

(Embodiment 3) FIG. 9 is a schematic sectional view showing Embodiment 3 of the electrode according to the present invention. FIG. 9 shows FIG.
Corresponding to. A third embodiment of the electrode according to the present invention will be described with reference to FIG.

The third embodiment of the electrode according to the present invention basically has the same structure as that of the first embodiment of the electrode according to the present invention, except that the center electrode line 13 shown in FIGS. ) And the outer peripheral electrode wire 12 (see FIG. 3) are composed of the insulating coating stranded wires 22a to 22g. That is, the wire electrode portion 4 of the electrode shown in FIG. 9 has six insulation-coated stranded wires 22b to 2 around one insulation-coated stranded wire 22a.
It is composed of a stranded wire in which 2 g is twisted together.

In the insulated coated stranded wires 22b to 22g corresponding to the outer peripheral electrode wires, a gap 17 (see FIG. 2) is formed as a gap in the middle of the path as in the electrodes shown in FIGS. ing. That is, the insulated coated stranded wires 22b to 22g corresponding to the outer peripheral electrode wire are similar to the electrodes shown in FIG. 2 in that the first part located on the tip side of the wire electrode part 4 and the first part are Insulated stranded wire 22b-2
And a second portion arranged with a gap 17 (see FIG. 2) in the extending direction of 2 g. Therefore, as in the first embodiment of the present invention, it is possible to increase the number of places where discharge occurs.

The insulating coating stranded wires 22a to 22g have the same structure. That is, the insulating coated stranded wires 22a to 22g are a strand in which a strand 20 made of a plurality of steels and a strand 21 made of copper are twisted together, and the strand (a bundle of the twisted strands 20 and 21). And an insulating coating film 14 as a dielectric disposed on the surface of the. In the cross section of the insulating coating stranded wires 22a to 22g, FIG.
As shown in FIG. 5, the strands 20 as high-strength strands made of steel, which is a high-strength material, are arranged almost uniformly in a bundle of strands 21 made of copper.

In this way, some of the wires 20, 21 forming the wire electrode portion 4 are made of steel, which is a high-strength material, and therefore, the first embodiment of the present invention. Similar to the electrode 1 (see FIG. 1) according to the above, it is possible to realize the wire electrode portion 4 which has sufficient durability against the impact due to the pressure wave and can supply a large current.

Further, since the steel wires 20 as high-strength wires are dispersedly arranged in the insulated coated stranded wires 22a to 22g, even if the steel wires 20 generate Joule heat, The heat can be easily removed by the surrounding copper wire 21.

A structure in which the steel strands 20 are dispersed in the copper strands 21 only for some of the insulation-coated strands 22a to 22g constituting the wire electrode portion 4 is used. May be In this case, the insulating coated stranded wire in which the steel strands 20 are not dispersedly arranged may be a bundle of only the strands 21 made of copper coated with the insulating coating film 14.

(Embodiment 4) FIG. 10 is a schematic sectional view showing Embodiment 4 of the electrode according to the present invention. FIG. 10 corresponds to FIG. 9. Embodiment 4 of the electrode according to the present invention will be described with reference to FIG.

As shown in FIG. 10, Embodiment 4 of the electrode according to the present invention basically has the same structure as that of Embodiment 3 of the electrode according to the present invention, except that the stranded wires 22a ...
The distribution of the steel wire 20 and the copper wire 21 at 22 g is different. That is, in the electrode shown in FIG. 10, the insulating coated stranded wire 22a corresponding to the center electrode wire (located substantially at the center in the cross section of the electrode in the direction substantially perpendicular to the extending direction of the electrode) is formed. The wires are all wires 20 made of steel as a high-strength material. On the other hand, the insulated coated stranded wire 22 corresponding to the outer peripheral electrode wire
For b to 22g, the wires arranged inside are all copper wires 21.

In this way, the third embodiment of the present invention will be described.
In addition to the effect obtained by the electrode according to the above, since the insulating coated stranded wire 22a composed of the wire 20 made of steel, which is a high-strength material, is arranged at the center of the wire electrode portion 4 constituting the crushing device electrode. Therefore, the strength of the wire electrode portion 4 can be reliably improved.

Further, since the insulated coated stranded wires 22b to 22g made of the copper wire 21 (other wire) which is a material having a relatively low electric resistance are arranged on the outer peripheral side of the wire electrode portion 4,
When supplying the high frequency current to the wire electrode portion 4, the electric resistance in the wire electrode portion 4 can be effectively reduced.

(Fifth Embodiment) FIG. 11 is a schematic sectional view showing a fifth embodiment of the electrode according to the present invention. FIG. 11 corresponds to FIG. 9. Embodiment 5 of the electrode according to the present invention will be described with reference to FIG.

As shown in FIG. 11, Embodiment 5 of the electrode according to the present invention basically has the same structure as that of Embodiment 3 of the electrode according to the present invention, except that the stranded wires 22a ...
The arrangement of the steel wire 20 and the copper wire 21 arranged inside 22 g is different. That is, in the electrode shown in FIG. 11, the steel strands 20 are collectively arranged in the central portion of all the insulation-coated strands 22a to 22g (in the extending direction of the insulation-coated strands 22a to 22g). On the other hand, the wire located at the substantially central portion in the cross section in the substantially vertical direction is the steel wire 20). And this steel strand 2
A plurality of copper strands 21 are arranged so as to surround 0.

Even in this case, the same effect as that of the third embodiment of the electrode according to the present invention can be obtained, and at the same time,
It is possible to surely improve the strength of each of the insulation coated stranded wires 22a to 22g.

In the third to fifth embodiments, as in the electrode shown in the second embodiment of the present invention, the insulated coating stranded wires 22a to 22g facing the gap 23 (see FIG. 6). A cap member 18 (see FIG. 6) made of silver as a layer containing a noble metal may be disposed on the end face of the. Further, a brazing part 19 (see FIG. 6) brazed with silver as a layer containing a noble metal may be formed on the end faces of the insulating coating stranded wires 22b to 22g facing the gap 17 (see FIG. 6). . In this case, the crushing force due to the discharge at the electrodes can be increased.

Further, the cap member 18 or the brazing part 19 (see FIG. 6) may be formed on only one of the end faces of the insulating coated stranded wires 22a to 22g facing the gaps 17 and 23. Moreover, the gap 17 may be formed only in a part of the insulating coating stranded wires 22b to 22g corresponding to the outer peripheral electrode wire, or the insulating coating stranded wires 22b to 22g.
A plurality of portions may be formed for each 22 g. Further, as the layer containing the noble metal, the insulating coating stranded wire 22 is formed by another method instead of the cap member 18 or the brazing portion 19.
You may arrange | position silver as a noble metal on the end surface of a-22g. For example, you may use the method of vapor-depositing silver on the end surfaces of the insulating coated stranded wires 22a to 22g. Further, as the material forming the cap member 18 and the brazing part 19 arranged on the end faces of the insulating coated stranded wires 22a to 22g, in addition to the above-described silver as in the second embodiment of the present invention, gold, platinum , Iridium, rhodium, ruthenium, palladium, and alloys thereof may be used.

Further, in the above-described first to fifth embodiments, the case where copper is used as the material forming the conductor 16 (see FIG. 3) or the strand 21 (see FIG. 9) other than steel is described. Although shown, the conductor 16 or the wire 21 may be made of aluminum or silver instead of copper.

Further, the arrangement and number of the gaps 17 in the wire electrode portion 4 (see FIG. 2) can be appropriately changed according to various conditions such as hardness of the crushing object and crushing position.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above-described embodiments but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

[0092]

As described above, according to the present invention, by using a high-strength material such as steel as a part of the material forming the crushing device electrode made of a stranded wire, the durability of the crushing device electrode can be improved. Can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining Embodiment 1 of an electrode and a crushing device using the electrode according to the present invention.

FIG. 2 is a schematic perspective view showing a tip portion of the electrode shown in FIG.

3 is a schematic cross-sectional view taken along line III-III in FIG.

FIG. 4 is a schematic cross-sectional view in the longitudinal direction of a center electrode wire forming the electrode shown in FIG.

FIG. 5 is a schematic sectional view showing a modification of the first embodiment of the electrode according to the present invention.

FIG. 6 is a partial perspective schematic view showing Embodiment 2 of the electrode according to the present invention.

FIG. 7 is a schematic cross-sectional view in the longitudinal direction of the center electrode wire forming the wire electrode portion shown in FIG.

8 is a schematic cross-sectional view in the direction along the extending direction of the outer peripheral electrode wire, in the vicinity of a gap formed in the middle of the outer peripheral electrode wire in the wire electrode portion shown in FIG.

FIG. 9 is a schematic sectional view showing Embodiment 3 of the electrode according to the present invention.

FIG. 10 is a schematic sectional view showing Embodiment 4 of the electrode according to the present invention.

FIG. 11 is a schematic sectional view showing Embodiment 5 of the electrode according to the present invention.

FIG. 12 is a schematic diagram for explaining a crushing device related to the present invention.

FIG. 13 is a schematic diagram showing a tip portion of an electrode of the crushing device shown in FIG.

FIG. 14 is a schematic perspective view showing a modification of the crushing device electrode according to the present invention.

[Explanation of symbols]

1 electrode, 2 crushing object, 3 connector part, 4 wire electrode part, 5 cable, 6 pulse power source, 7 switch, 8 capacitor, 9 power source, 10 pilot hole, 11
Water, 12 outer peripheral electrode wire, 13 center electrode wire, 14 insulating coating film, 15, 16 conductor, 17 gap, 18
Cap member, 19 Brazing part, 20, 21 Elementary wire, 22a to 22g Insulated coated stranded wire, 23 Gap, 24 Front end side conductor part, 25 Rear end side conductor part.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toru Okazaki             1-3-3 Shimaya, Konohana-ku, Osaka Sumitomo Electric             Ki Industry Co., Ltd. Osaka Works (72) Inventor Toshihiro Kamakura             1-3-3 Shimaya, Konohana-ku, Osaka Sumitomo Electric             Ki Industry Co., Ltd. Osaka Works F-term (reference) 2D065 EA26                 4D067 CG01 GA02

Claims (11)

[Claims] 1. An electrode for a crushing device, which comprises a stranded wire formed by twisting a plurality of linear conductors arranged so as to face each other with a dielectric interposed therebetween, wherein: The material forming the at least one linear conductor is a material having a higher strength than the material forming the other linear conductors other than the one linear conductor among the plurality of linear conductors, Electrodes for crushing equipment. 2. The linear conductor made of the high-strength material is located substantially at the center of a cross section of the stranded wire in a direction substantially perpendicular to the extending direction of the stranded wire. The crushing device electrode according to 1. 3. At least one of the plurality of linear conductors includes a first conductor and a second conductor that is arranged with a gap from the first conductor. The electrode for a crushing device according to claim 1 or 2. 4. A layer containing a noble metal is formed on a surface of at least one of the first conductor and the second conductor facing the gap.
An electrode for a crushing device according to. 5. An electrode for a crushing device, which comprises a stranded wire in which a plurality of strands including a plurality of elemental wires made of a conductor are arranged so as to face each other with a dielectric interposed therebetween and twisted together. The material forming at least one wire among the wires is a material having higher strength than the material forming the other wires other than the one wire among the plurality of wires. Electrodes for crushing equipment. 6. The plurality of strands includes a plurality of high-strength strands made of the high-strength material, and the high-strength strands are dispersed and arranged inside the strands. The crushing device electrode according to 5. 7. The strands forming the strands located substantially at the center of the cross section of the twisted wire in a direction substantially perpendicular to the extending direction of the twisted wire are made of the high-strength material. The crushing device electrode according to claim 5. 8. The crushing device electrode according to claim 5, wherein the strands located substantially in the center in a cross section substantially perpendicular to the extending direction of the strand are made of the high-strength material. . 9. At least one of the plurality of strands has a first portion and a second portion which is arranged with a gap in the extending direction of the first portion from the first portion. Claim 5 including
An electrode for a crushing device according to any one of items 1 to 8. 10. The noble metal-containing layer is formed on a surface of at least one of the first portion and the second portion facing the gap. Electrodes for crushing equipment. 11. A crushing device comprising the crushing device electrode according to any one of claims 1 to 10.